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A 250V, 50Hz single-phase supply feeds the following loads
(i) incandescent lamps taking a current of 10A at unity power factor,
(ii) fluorescent lamps taking 8A at a power factor of 0.7 lagging,
(iii) a 3kVA motor operating at full load and at a power factor of 0.8 lagging and
(iv) a static capacitor
Determine, for the lamps and motor,
(a) the total current,
(b) the overall power factor and
(c) the total power.
(d) Find the value of the static capacitor to improve the overall power factor to 0.975 lagging.
If the charges are situated in a medium of permittivity ε, then the magnitude of the force between them will be, If the charges are situated in a medium of permittivity ε, then th
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what is mean by priciple of moments
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consider a star orbitining in the sperically graviational potential Y=(Vc)2 ln(r/r0). a)use conservation of energy and angular momentum to obtain equation for dr/dt and d(teta)/dt
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An equiconvex lens has the radius of one curved surface is 0.12 m and focal length of 0.10 m. Determine the refractive index of the material of the convex lens.
explain the process of power generation and transmission?.
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